Vincent l



(No Model.) y

V. L. OURDAN.

INSTRUMENT POR ENGRAVING COMPASS FACES. No. 344,676. Patented June 29, 1666.

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rares l iinrrnn Arent arrose INSTRUMENT FOR ENGRAVING COlVlPASSnF/CES.

SPECIFICATION forming part of Letters Patent No. 34L,6'76, dated June 29, 1886.

Application filed February 25, 1886. Serial No. 193.170. (No model.)

To @ZZ whom it may concern.-

Beit known that I, VINCENT L. QUEDAN, a citizen of the United States` residing at Washington, in the District of Columbia, have invented certain new and useful Improvements in Engraving- Instruments; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to instruments for engraving compass-faces; and it consists in the combination of an annular base provided with three hundred and sixty holes or notches, corresponding with the degrees of a circle, an annular rotating carrier iitted to move accurately on said base, hearing stops or catches for locking the carrier at any degree-point.

It consists,`also, in the combination of the carrier, a transverse track or Way provided with adjustable stops or gages,and an engraving-tool.

It consists, also, in the combination, with the base, ot' an adjustable ring provided with one hundred and twenty-eight holes or notches, corresponding with the points of the compass,7 as well as in certain details of construction and particular combinations, to be hereinafter described, and pointed out in the claims.

The mariners compassface,as engraved and printed upon charts at the present time, consists ot' four concentric circles, 'upon which are engraved the division-marks of a circle, the zero-point ot` which corresponds with the true pole. Within t-hese circles, concentric therewith, is engraved the old` form of mariners compass, indicating the variation of the needle at a given place.

In the drawings, Figure 1 is a plan. Fig. 2 is a section on line m x. Fig. 3 is adetail of a segment ot' the under side of the base, and Fig. 4 is a detail showing the face of the swinging stop-carrying arm fi.

A is the annular base, provided with three hundred and sixty degreeniarks, notches, or or holes, c, with an annular groove for the adjusting-ring, with slots a a countersunk on t-he under side, by means of which the ring B may be set to correspond with the variation ot' the compass at a given place. It also has an upwardly-proj ecting lip or ange, ci, at the inner edge, and is provided with a scale, as b, by which the adjusting-ring is set.

B is an adjusting-ring, fitted to the groove inthe base, as shown. It has one hundred and twenty-eight holes, corresponding with the points of the compass. Its outer edge is beveled and provided with a Vernier, as F', for setting the ring with relation to the base to correspond with the variation.

The base A forms or constitutes a track for the carrier upon which said carrier freely moves. It also forms a bearing for the adjusting-ring` which may be set by aid of the scale on the base and Vernier on the ring. The ring is clamped and fixed to the base at the desired point by means of set-screws o o in the countersunk slots in the base.

Cis the carrier upon which are mounted stops or catches c c and the transverse track or way C. This track is arranged across the carrier at one side of the center, so that the tool arranged at the side of the track will move in radial lines. One of these catches engages With the outer row of holes in the base and the other engages with the holes in the adjustable ring. These catches are adapted to be lifted out of operative position and locked, so that either may be used at Will.- The carrier is held to the base by a confining ring or plate, d, which is screwed or otherwise secured or made part of the lip or iiange ai.

VOnthe transverse track C are iiXed adjustable stops o c2, and there is also mounted thereon between said stops, by means of a suitable sliding carriage, an engraving-tool, m. This tool is preferably mounted so as to be at all times perpendicular to the general plane of the plate.

The stop c consists of an adjustable block carrying a swinging arm, i, having projections of different lengths, for limiting and regulating the length ofthe radial cuts of the tool.

Gisa post attached to the arm of the engraving-tool, to hold Weights for regulating the depth of the cut in the plate.

There is combined with the toolcarrying arm a cam, n, through which the arm may be lifted to hold the tool out of contact with the plate.

The operation of my new instrument is as follows: Set the adjusting-ring with relation IOO to the base to correspond with the variation of the compass. Then secure the instrument to the plate, so t-hat the zero-point ofthe degreemarks on the base Will correspond with the true compass. Then lift and lock the catches c c. Then successively set the tool on the transverse track in the proper positions and describe the several circles. Then adjust the stops c o2, and set the lcatch in the zerohole of the base and out the proper radiating line by sliding the tool-carnage and tool on the trackVY Y Vtric with the base, substantially as described.

between the stops.` Then release the catch and set it in the succeeding hole, and cut the next radiating line, and so on until the-degree-marks are all cut. The length of the radiating` lines for one, live, and ten degreemarks are regulated by the stop :o2 andthe swinging arm i with its differential projection.

After this is done, lift and lock the outer catch, l

c, and release the other and setit into the zero.

hole of the adjusted ring and there cut the ran diating lines representing the points of the compass .in like manner with the foregoing.

Having described my invention, whatI. claim as new, and desire to secure by Letters Patent, is-

1. In an engravinginstrument,the con1b i,

nation of an annular base and anannularrotatingftool-carrier, and a tool working withinA nation, with an annular base, of ya rotating carrier, a transverse track, and a tool-carriage, and a suitable `stoplfor limiting the movementof the carriage, as specified.

.marks, an adjustable .ring having stops,

notches, or marks, means for locking the two together, and a rotating tool-carrier concen- 6. In an engraving-instrument, the combination, with a rotating carrier, of a transverse track, adjustable stops, and a movable tool carriage or holder, as set forth.

7. In an engraving-instrument, the combination of a movable tool-holder, an adjustable stop, anda swinging arm having projections ,of different lengths, substantially as specified.

8. Inaan.engraving-instrument, the combination of a -base 4having stops, notches, or marks, an adjustable ring having stops, notches, or marks, and an annular movable carrier, provided with means for catching or lockingwith the base and ring, as setforth.

9. In an: engraving-instrument, the combination of a base having stop-notches and an :adjustable `ring having notches, an annular carrier having spring-catches for locking the said carrieryto the base and ring, a transverse traclgand a toolcarrier sliding on said track, and adjustable stops for regulating the range of the tool,-as specilied.

In-testimony whereof I affix my signature in presence.. of .two witnesses.

VINCENT L. OURDAN.

Witnesses:-

WM. H. WETZEL, FRED G. CALVERT. 

